These are the R codes (organised by figure) and Excel spreadsheet in support of an essay that provides a statistical reflection and caveat on the concept of correlation strength in the context of transcriptomics-proteomics studies. The essay is a caveat for cell biologists, data scientists, and biostatisticians who should recognise that mRNA–protein correlation alone is insufficient to justify using a single mRNA quantification to infer the amount or function of its corresponding protein.